class DVD extends Product
{
	private String itemDirector;

	public DVD(int itemNumber, String itemName, String itemDirector,
			long invQuantity, double itemPrice) {
		super(itemNumber, itemName, invQuantity, itemPrice);
		this.itemDirector = itemDirector;
	}

	public String getItemDirector() {
		return itemDirector;

class DVD extends Product
{
	public String itemDirector;
				
	public DVD(String itemDirector,int itemNumber, String itemName, long invQuantity, double itemPrice) 
		{
			super(itemNumber, itemName,

class DVD extends Product
{
	private String itemDirector;
			
	public DVD(String itemDirector,int itemNumber, String itemName, long invQuantity, double itemPrice) 
		{
			super(itemNumber, itemName,

class Product implements Comparable
{
	private long itemNumber;    // class variable that stores the item number

import java.util.Arrays;

class Inventory3
{
	public static final int MAXIMUM_ITEMS = 4;
	private static Product product[] = new